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Z Motor Stand-off for FolgerTech 2020 i3

by wderoxas, published

Z Motor Stand-off for FolgerTech 2020 i3 by wderoxas Jul 22, 2015
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UPDATE:
Re-uploaded the STL files with units in mm.

Standoff for Z motor on Folgertech's 2020 i3. This can free up around 40mm Z build height originally taken by the Z motor shaft and coupler. I designed this for an 8 mm leadscrew constrained with a 608 bearing at the top, however, stock m5 rod supplied with the kit should work just fine with or without the 608 bearing.

If used with 608 bearing, the coupler doubles as a collar.

z_motor_mounts.stl requires around 65mm m3 bolt. Rev2 eliminates this but needs 4 additional m3 bolts and nuts.

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Comments deleted.

Just about to print these and was wondering why you'd have a bearing to constrain the movement of the coupler? Isn't the point of the flexible coupler to account for alignment issues and possibly rods that aren't straight?

Can anyone that's using the 608 bearings comment if print quality is affected?

Printed these yesterday and went to install them tonight. Noticed an issue with the design as soon as I went to bolt them up. Only one of the four corners has a recess for the screw head on the upper part of the rev2 design that I printed. The other 3 corners have a sloped surface that the bolt head wants to tighten against but can't really do so effectively since it's sloped. Even worse for me it adds an extra couple of mm that makes the difference between 10mm bolts working 16mm bolts. I have lots of 10mm on hand...but only 1 16mm. So I've got an extra trip to the hardware store now before I can get my printer back together.

Can't wait to get this upgrade installed...but is there a reason why only one of the 4 top corners has that recess with a flat spot for the screw head to seat?

Just noticed this myself. Already 1/3 of the way through the print so I'll make due somehow. Should be fixed though.

Heartless made a new remix with the holes all properly countersunk...but if you're 1/3rd through printing a bit of xacto work is probably your best bet :D

http://www.thingiverse.com/thing:1288802

FT Z motor standoff - remix

New updates work great! Printed and mounted these yesterday. Now I get 165mm Z height wooo! I used M3x20mm for the bottom(bracket) and original screws for the top(motor).

Great design the taper for the top of the posts is great no support needed. Thanks!

This looks nice, and I intend to try it out. What length screws did you use in version 2, at the top and bottom?

I used the original motor screws for the top. Then 16mm m3 bolts and nuts. at the bottom.

Just tried the original motor screws that came with my kit...and they aren't long enough for the top :( They work on the one hole that has the countersunk recess, but not on the other 3 corners. Maybe Folger is shipping shorter bolts now? These are 12mm long that came in mine and don't reach.

Debating whether to try and modify the standoffs or just get longer bolts....

Looks great but imports at the wrong scale in repetier. In 3ds max ill use metric and set the global units to ; 1 unit = 1 mm ; and then import to repetier with mm as the units.

I noticed if you already modeled something in max in one unit and then try to change units it does not translate well at all, sizes way off. How did you print yours?

These were exported from autodesk inventor. Unfortunately, when i exported this to stl format, i forgot to check the export units used. The default is cm, so this should be cm. Ill be updating the files when i got the time. Meanwhile, you can either scale it up to 10 in repetier or if available, change the units of imported object to centimeters.

I used a fresh install of the software when i exported this. The original stl file i used before where using the correct export units. Unfortunately, i forgot where i dumped them thats why i had to re-do the stl export.

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